An approach to obtaining laboratory single-cylinder engine fuel octane ratings that agree with car road octane ratings is described.The technique is based on attaining, in the single-cylinder engine, a general duplication of the combustion environment which exists in the multicylinder automotive engine. Because it proved suited to this purpose, a special single-cylinder power section mounted on a CFR crankcase was used. The influence of speed on fuel borderline ratings was in substantial agreement with automotive engine results.Results were obtained on a variety of commercial gasolines and special blends representing extreme variations in hydrocarbon composition. Comparative rating work covered a variety of 1947–1952 and 1955 cars; automotive engine compression ratios ranged from 6.5 to 9.0, and ratios of 10, 11, and 12 were obtained with special engines, heads, and pistons. For fuels of 68 to 105 octane number, single-cylinder engine ratings agreed with car ratings with a maximum spread of three Octane units. In contrast to this, the ASTM Research and Motor ratings deviated by as much as 10 octane units.An approach to obtaining laboratory single-cylinder engine fuel octane ratings that agree with car road octane ratings is described.The technique is based on attaining, in the single-cylinder engine, a general duplication of the combustion environment which exists in the multicylinder automotive engine. Because it proved suited to this purpose, a special single-cylinder power section mounted on a CFR crankcase was used. The influence of speed on fuel borderline ratings was in substantial agreement with automotive engine results.Results were obtained on a variety of commercial gasolines and special blends representing extreme variations in hydrocarbon composition. Comparative rating work covered a variety of 1947–1952 and 1955 cars; automotive engine compression ratios ranged from 6.5 to 9.0, and ratios of 10, 11, and 12 were obtained with special engines, heads, and pistons. For fuels of 68 to 105 octane number, single-cylinder engine ratings agreed with car ratings with a maximum spread of three Octane units. In contrast to this, the ASTM Research and Motor ratings deviated by as much as 10 octane units.


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    Titel :

    An Approach To Obtaining Road Octane Ratings In A Single-Cylinder Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Barber, E. M. (Autor:in) / Wilson, H. I. (Autor:in) / Randall, T. H. (Autor:in)

    Kongress:

    Pre-1964 SAE Technical Papers ; 1906



    Erscheinungsdatum :

    1957-01-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Approach to obtaining road octane ratings in single-cylinder engine

    Barber, E.M. / Wilson, H.I. / Randall, T.H. | Engineering Index Backfile | 1956


    Approach to obtaining road octane ratings in single-cylinder engine

    Barber, E.M. / Wilson, H.I. / Randall, T.H. | Engineering Index Backfile | 1956


    Automated Fuel Road Octane Ratings

    Keller, B. D. / Rueckel, H. E. / Ginsburgh, I. et al. | SAE Technical Papers | 1973


    Octane Ratings

    Smetana, Frederick O. | AIAA | 2001


    Testing of high-octane fuels in single-cylinder airplane engine

    Seeber, F. | Engineering Index Backfile | 1940